Wrench.



P. HAGHMANN.

WRENCH.

APPLICATION FILED snpnaa, 1909.

Patent-,ea May 9, 19'11.

automatically acting means coperates for lwhich the movable jaw is' manually a UNITED sTATEs PATENT oEErcE.

FREDERICK HACHMANN, OF MINNEAPOLIS, MINNESOTA, ASSIG-NOB, BY MESNE .AS-,- .SIG'NMENTS, T0 CHASE TOOL MANUFACTURING COMPANY, A CORPORATION OF MINNESOTA.

warnen.

Patented May 9, 1911.

Application tiled September 23, 1909. Serial No. 519,268.

To all whom 'it may concern:

Be it known that l, FREDERICK HACH- MANN, citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Wrenches Particularly as Applied to the Type of Wrench Known as the Stillson Pipe-Wrench, of which the following is a full and comprehensive specification.

rlhis invention relates to wrenches especially adapted for use in connection with pipes, and the principal object of the same is to provide novel manually operable means for adjusting the movable jaw with which novel gripping said jaw to the article to be turned.

In carrying out the obj ects ofthe invention generally stated above it will be understood, ofcourse, that the essential features thereof are necessarily susceptible of changes in details'and structural arrangements, one preferred and practical embodiment of which is shown in the accompanying drawings, wherein Figure 1 is a view in side elevation of the improved wrench. Fig. 2 is a view in front elevation thereof. Fig. 3 is a transverse sectionalview taken on the line 3-3, Fig. 1. Fig. 1 is a top plan view of the means b justed. Fig. 5 is a vertical sectional view taken Ion the line 5 5, Fig. 4.

Referrin to the accompanying drawings by numeras, 1 designates the handle of the improved wrench which is provided with a fixed jaw 2 at one' end. A housing 3 is ivotally connected. to jaw 2 and is rovide with a reduced angularly arrange Vforward extension 4 which loosely embrace the handle 1. A spring 5 fastened to the forward portion of jaw 2 engages the free end of said extension 4' and exerts a pressure tending to prevent the housing 3 bemg rodked in one direction. Another spring 6 carried by handle lengages housing 3 and opposes. rocking movement of said housing in an opposite direction. Housing 3 projects laterally from the rear of jaw 2 and has the shank 7 of an outer 'aw 8 slidable therethrough. Said shank is provided with threads 9 on the front and rear longitudinal edges. Shank 7 is adjusted outwardly relativelyl to the xed jaw 2 by means of the j ing and holdin nuts 10 and 11 which are provided with the oppositely disposed threads that engage the threads of the said shank. Nut 10 is provided with a roughened outer surface, and has a reduced upper extension 12 which ex-` tends into the recessed lower portion 13 of nut 11. The wall of said recess 13 is provided with slots 14 which extends approximately one-quarter ofthe circumference of said nut, and the extension 12 of nut 10 that extends into said recess is provided with lugs 14 which enter said slots to limit the rotation of nut 10 relative to nut 11 to approximately one-quarter of `a revolution. Nut 11 is provided with two external notches 15. The nuts l0 and 11 project through the usual side openings 16 of the housing 3 and are prevented from having longitudinal movement in said housing by contact with the upper and lower edges of said openings, in a manner well understood. A locking pawl 17 is carried by housing 3 adjacent one of the side openings 16 and engages with the notches 15 of nut 11 to prevent reverse rotation of said nut. v

The shank 7 projects beyond the base of housing 3 and enters a sleeve 18 that -is provided with angularly projecting embracing plates 19 that extend on opposite sides of handle 1. Said plates are provided with slots' 20 which are engaged by the headed lu 21 that project from handle 1 to permit sleeve 18 to have a limited lateral movement relative to said handle. A screw cap 22 is seated in the base of sleeve 18, and a spring 23 connects said cap with a lug 24 projecting from the lower end of shank 7. The spring 23 is contractible, and is constantly exerting a pressure tending to draw shank 7 within sleeve 18.

The nuts l0 and 11 as aforesaid, are threaded complemental tothe threads of shank 7, and when adjusting the said shank, nut 10 is vrotated and while its threads are engaged with the threads of the shank, the shank will be adjusted. As the threads of the nut 10 leaves the threads of the shank, the lugs 14 reach the ends of the slots 14 of the nut 11, and cause said nut 11 to rotate with nut 10 and 'engage the threads of shank 7 thereby holding shank 7 against the inward pull of spring 23. During this adjustoperation of the nuts 10 and 11, the paw 17 engages the notches 15 'of nut 11 and prevents reverse rotation thereof. This adjusting and holding operation is continued until the jaws are in proper position about the article to be turned, Whereupon the nuts are rotated to .positions Where they are disengaged from the threads of the shank, and the springV 23 automatically draws shank 7 into sleeve 18 'and thereby tightly clamps the outer jaw to the article to 'be turned. When said jaw has been drawn to a clamping position, a part rotation of nuts 10 and 11, Will engage the threads of shank 7 and thereby hold said shank immovable.

Housing 3 being pivotally connected to Xed jaw 2, and sleeve 18 beingA connected to handle 1 so that it can be moved laterally relative to said handle, it will be seen that the outer jaw 8 can be rocked relative to jaw 2 so that the operation of turning a pipe or Y y vided With a jaW, a houslng pivotally connected to said jaw, a sleeve carried by said handle and capable of limited lateral movementfrelative thereto, an outer jaw having a shank in said housing and sleeve, means for manually adjusting said shank in one direction, and means for automatically adjusting said shank in an opposite direction.

2. A Wrench comprising a handle provided With a jaw, a housing pivotally connected to said jaw, a sleeve carried by said handle and capable of a lateral movement relative to said handle, a shank slidable in said sleeve and housing, and provided With a jaw, means in said housing for manually adjusting said shank in one direction, and

resilient means in said sleeve for automativoppositely cally adjusting said shank in an opposite direction.

3. A Wrench comprising a handle provided With a jaw, a housing pivotally connected to said jaw, a sleeve carried by said handle and capable of limited lateral mov'ement relative to said handle, and an outer jaw havin-g a shank adjustable in said sleeve and housing.

4. A Wrench comprising a handle provided with a jaw, a housing carried by said jaw, a laterally movable sleeve carried by said handle, an outer jaw having a shank slidable in said housing and sleeve, a nut for adjusting said shank in one direction, a sec-` ond nut coperating With said first-mentioned nut to adjust said shank, and means Within said sleeve for automatically adjusting said shank in an opposite direction.

5. A Wrench comprising a handle provided with a jaw, a housing carried by said jaw, a sleeve carried by said handle, a shank slidable in said sleeve and housing, and provided with a jaw, said shank provided With disposed threads, an adjusting nut in said housing and provided with oppositely disposed threads for engaging the threads of said shank, aholding nut also in said housing and provided With oppositely disposed threads for engaging the threads of said shank, means connecting said nuts and permitting a limited relative rotation thereof, means carried by said housing for preventing reverse rotation of the holding nut, and means connecting said shank to said sleeve for automatically adjusting said shank in a direction opposite to the direction of adjustment of the adjusting nut.

In Witness Whereo I have hereunto set my hand this 20th'day of September 1909.

FREDERICK HACHMANN.

Witnesses:

JOHN P. Din/Anny, HELEN D. ELLIOT. 

